a noun used to describe something that is stupidly funny, stupid humor. It is also a website with many pictures of cats.
Tom: Omg, did u see mike fart on the teacher?
Ralph: Yea, it was roflcats!

Drew: I went on roflcats.com last night
Peter: Those cats are funny!
by Mother Farger October 28, 2007
a website that shows pictures of cats in strange poses that include a clever tag line.
bill: did you check out the new roflcat?
bob: no, how is it?
bill: amazing!
by alexthejew November 29, 2007

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